Float feed mechanism for carbureters.



C. L. RAYFIELD. FLOM FEED MECHANISM FOR CARBURETEHS.

2 SHEETS-SHEET IV C. L. RAYFIELD. FLOAT FEED IVIECHANISIVI FOR CARBURETERS.

APPLICATION FILED SEPT. I, I9] I. LQQZGL Patented Apr. 10,1917.

2 SHEETS-SHEET 2.

CHARLES L. RAYFIELD,

or cutaneo, ILLINoIs FLOAT FEED MECHANISM FOR CARBURETERS.

Application led September 1, 1911.

To all whom t may concern.'

Be it known that I, CHARLESL. RAYFIELD, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Float Feed Mechanisms for Carbureters; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numbers ofl reference marked thereon, which form a part of this specification.

This invention relates to mechanism for the control of the inlet of hydro-carbon Huid to carbureters by means of a :[ioat adapted to bevsupported upon the fluid.

The invention is shown in connection with a carbureter such as set forth in my patent for carbureters, No. 1,193,820, of August sth, 191e. l

The object of the invention is to aord primarily perfect control of the inlet of hydro-carbon fluid-for example, gasolene to regulate the quantity to be contained in the oat feed chamber normally to suit the requirements for the jet or jets to the mixing chamber. 1

It is also an object of the invention to afford a. construction adapted to facilitate assembling, adjustment and repair, and ren' parts thereof readily and quickly dering all accessible. Y

It is also an 4object of the invention to afford a construction in which the inlet of the gasolene or other hydro-carbon fluid, is controlled by` a suitable needle valve operated by a float and held open when the quantity of the fluid in the float feed chamber 'falls below normal working requirements.

It is an objectfof the invention also to afford a construction in which the needle valve for the inlet passage to the float feed chamber, is disposed coaXially with one of the outlet jet nozzles, and in which the' jet nozzle or nozzles may be removed from the carbureter, and also the inlet needle valve without disturbing the adjustment of the remaining portions of the earbureter.

rllhe invention, in itspreferred form, consists in the matters hereinafter illustrated and described.

In said drawings:

Figure 1 is a central, longitudinal section of a carbureter and oat feed mechanism embodying my invention.

Specification of Letters Patent.

Patented Apr. 1U, 191'?.

Serial No. 647,191.

f with. Secured to thecasing A, integrally or in any suitablemanner, is a casing 1, sub-r stantially cylindric in form, and having an integral bottom 2, and affording an interior float feed chamber C. Extending forwardly at the bottom of said chamber, is an extension D, of the float feed chamber, which lies beneath the extension B, of the mixing chamber, and is separated therefrom by a .horizontal wall 3, common to both.

Integrally formed on the bottom of the float feed chamber, is a downwardly extending cylindric bossrt, which, as shown, is tubular, and communicates with the float feed chamber, and is internally threaded to receive ithe -plug 5, threaded thereinto and which seals the joint between the same and the'lend of said'boss by means of a packing washer 6. A cover 7, is removably secured on'the top of the float feed casing 1, by means of cap screws 8, and isv provided centrallyT with anupwardly projcctinghub or boss .9, having a vent passage 10, therethrough, and' bored axially of the chamber to receive the rod 11, slidably therethrough, as shown in Fig. 1, which is 0f sufficient length to extend downwardly vin said boss 4.

The Hoat 12, is constructed wholly of sheet metal, as shown, though, of course, any suitable float may be employed, and extending through said float, as shown, isa sleeve 13, which extends above the float and at its top above the float, is slotted longitudinally and is engaged to the yguide rod which extends through said sleeve, by means of a clamp 14, thereby permitting the float to be readily adjusted on said guide rod. Rigidly secured on said rod below the float, is agball 4shaped body 15. j

A relativelylarge internally threaded bore is provided through the bottom of the extension D, of the float feed chamber, and threaded therein is a plug 16, having a downwardly extending,- axial bore therein,

of relatively large size, which communicates at the axis of the plug with a smaller bore or passage extending through the plug. A peripheral downwardly extending internally threaded fiange 17, integral with said "Halitg, has engaged therein a connection 18,

affording a relatively large chamber in the top thereof, across which is secured a fine wire gauze screen 19, and threadedinto the internally threaded bore in said connection, is a pipe 20,-which leads to the gasolene or other hydro-carbon fuel supply tank.

Threaded through a suitable aperture in the wall 3, separating the extension D, of the float feed chamber from the extension B, of the mixing chamber, and at its upper end extending well above said wall or floor, is a jet nozzle 21, normally7 closed by a needle valve 22, which is held in engagement therewith by means of a spring 23, engaged on the upper end thereof, and seated in a suitable recess in a bracket arm 24, in which the upper end of said needle valve stem is slidably engaged. The lower end of said jet nozzle extends well down into the extension D, of the float feed chamber and telescoping thereover is a sleeve 25, which is connected integrally or otherwise, with the reduced and tapered valve closure 26, extending into the bore in said plug 16, and affording a needle valve closure to control the passage therethrough. Suitable apertures 25*1 open into said sleeve from the float feed chamber, as shown in Fig. 1,. to permit the flow thereinto of the liquid or fluid within the float feed chamber.

Extending around said guide sleeve 25, is a peripheral flange-26, andsecured around the upper end of said sleeve and bearing at its upper end on said wall 3, and at its lower end 'on said flange, is a coiled spring 27. Rigidly but removably secured in the bottom of the float feed chamber by means of a cap screw 28, is an arm or bracket 29, which extends over the axial aperture in the floor of the float feed chamber and is enlarged thereat, and is provided on its under side with a peripheral downwardly extending flange 30, to fit in said aperture, and, together with said screw, acting to holdl said bar from movement. An u wardly extending projection 31 is provi ed on said'bar adjacent the extension D, of the float feed chamber, and pivotally engaged thereon is a lever 32, one end of which extends beyond the axis of the float feed chamber and is apertured to receive the guide rod 11, therethroughthe ball shaped enlargement 15, on said rod, bearing on said lever and affording substantially an anti-friction bearing therefor. The other (or shorter) end of the lever, extends into the extension D, of the float feed chamber, and is yoked to engage the sleeve 25, therebetween.

The downward pressure of the spring 27,

and the relative proportions of the length of the arms of theflever 32, is such that, when the float is supported on the liquid by a sufficient quantity orheight'of liquid in the fioat feed chamber, said spring acts to close the inlet needle valve, but, when the level of the liquid falls inthe float feed chamber but slightly, the weight of the float, unsupported by thevliquid, acts to open said needle valve. Y i i Asshown, a passage 33, is provided in the plug 16, which extends downwardly and comlnunicates at its end with a peripheral passage 3l, extendingr around the plug and below which said plug is increased in diameter, affording an upwardly directed shoulder.

Secured beneath the lower open end of the mixing chamber, is a cup 35, provided with a rearwardly directed arm which is closely fitted to the plug 17, and supported thereby. The cup 35, has a longitudinal passage 36, which extends through the arm and which communicates with the peripheral passage 34, in the plug, the passage also communicating with an upwardly directed nozzle 37, which extends into the mixing chamber and slightly above the normal level of the liquid in the float feed chamber. Packing rings are provided as required above and below said arm, to seal the joint on each side thereof.

Any suitable air valves may bev provided for the. mixing chamber and any suitable connections therewith, to open the needle valve controlling the nozzle 21, leading into the extension B, of the mixing chamber. These, however, form no part of the present invention, and the description thereof, for

the sake of clearness is omitted.

Threaded on the central hub 9, at the top of the cover for the float feed chamber, is a tubular hood or casing 38, which is slotted on one side thereof, and pivotally engaged on said hood, and extending through a slot, is a bell crank lever, one arm 39, of which extends over the guide rod 11, to actuate the same, and the other arm 40, of which extends downwardly toward said cover 7,

for `the float feed chamber. A spring 41, engaged inthe top of said hood, bears down-` wardly above said arm 40, and acts to hold the longer end or arm ofsaid bell crank, normally elevated. y

A wire or rod may be connected at 42 vwith the end 40, of said bell crank lever, to permit the same to be actuated to force said guide rod and float downwardly, thereby opening the inlet valve to the float feed chamber to partly flood the carbureter in starting the Carburation.

In practice, the mechanism is exceedingly sensitive, slight variations in the level in the float feed chamber, serving to operate the inlet valve to open or close the same.

The jet nozzle 37, being at all times in open communication with the float feed chamber Y through the passages before described, dc-

obviously numerous details of construction and operation may vary, without departing from the principles of this invention.

I claim as my invention: v

1. In a device of the class described, a casing. having alined apertures in the top and bottom thereof, respectively, a small chamber extension formed on one side of said casing, a plug threaded into the lower end thereof affording a valve seat, an inlet needle valve mounted in said extension adapted to co-act with said seat to open and close the inlet to the casing, an outlet from said casing mounted in the upper end of the extension thereof and alined with the inlet thereto, a stem mounted in the casing,

a float adjustable onsaid stem for different fixed positions thereon, and a lever pivoted on the lower portion of said casing and operatively connected with-said stem, one end of said lever projecting into the extension to co-act with the inlet needle valve, and the other into a position to be actuated by said stem to cause opening of the needle valve when the float is lowered.

2. In a device of the classdescribed a casing having alined apertures in the top and bottom thereof, a small chamber extension on one side of said casing, a plug threaded into the lower end thereofaording a valve seat, an inlet needle valve mounted in said extensinn adapted to co-act with said seat to open and close the inlet to said casing,

an outlet from said casing in the upper end of said extension chamber, a stem mounted within said casing projecting through the alined apertures thereof, a bracket member extending into one of said alined apertures, a float adjustable on said stem, and a lever pivoted on said bracket adapted to eect actuation of said inlet valve by movement of said stem.

3. In a device of the class described a casing, an extension chamber formed integral therewith at one side thereof with the top wall of said chamber lower than the top wall of said casing,.alined inlet and outlet passages inthe respective bottom and top walls of said extension chamber affording an inlet and outlet respectively for the casing, said casing having apertures alined with one another in the top and bottom walls thereof, a float stem mounted axially in said casing extending through said apertures, a Heat adjustably mounted upon said stem, an inlet valve mounted in said extension chamber adapted to control the inlet passage thereof, and operative connections between said stem and said valve to cause opening of said valve with a lowering of said float.

4. ln a float feed mechanism for carbureters, a casing, an inlet thereto, a needle valve controlling said inlet, a spring normally impelling said needle valve toward closed position, a pivoted lever having slid- .ing connection with said needle valve operating when one end thereof is moved upwardly on said needle Valve to elevate the same toward open position, a stem slidable through the other end of said lever, means secured on said stem to limit the sliding relation between said stem and lever to support said stern on said lever, and a float in saigl casing adjustable into different positions and secured on said stem.

ln testimony -whereof l have hereunto subscribed my name in the presence of two subscribing witnesses.

CHARLES li. RAYFELD. Witnessesz i" CHARLES W. HILLS, Jr., GEORGE R. MOORE. 

